Herward m. Old English here, Old High German heri 'host, army' + Old English weard, Old High German wart 'guard, ward'.

Belgium

Latin

● 1212x1213 Herrewardus (nom) OvdFB 2

England

Latin

● 1185x1186 Herewardus (nom) PR-XXXVI p. 4; 1189 Hereward (nom) GASurv p. 77, Herewardi (gen) ibid. p. 158, Herewardus (nom) ibid. p. 106, Huereward (nom) ibid. p. 160, Huerewardi (gen) ibid. p. 160, Huerewardus (nom) ibid. p. 137; 1222 Herewardus (nom) StPaulDom p. 43, hereward (gen) ibid. p. 39, herewardi (gen) ibid. p. 34

France

Latin

● c823 Hairoardus (nom) irminon-vol2 36, Palatiolum; 1166 Heroardi (gen) CartNDdOurscamp XC; 1188 Heroardi (gen) ibid. XCIV; 1304 Hervardi (gen) ibid. LXXXVI; 1313 Herouardi (gen) ibid. LXXXVIII

Middle French

● 1392 Harouart MemBret-II col. 599, Herouart ibid. col. 605

Germany

Latin

● 1259 Herewardi (gen) CDL-1.1.1 XXXI; 1322 Harwardus (nom) SMM p. 158

Early New High German

● 1497 Herwart Nurn1497 408